subtheme generation via generate-theme broken

This Drupal page documents the starterkit change - →

Hmm, it looks like there are multiple automated ways to generate a subtheme.

Option 1 -

php web/core/scripts/drupal generate-theme my_theme --starterkit=bootstrap5

Option 2 -

drush --include="web/themes/contrib/bootstrap5/src/Drush" bootstrap5:generate-subtheme my_theme --subtheme-name="My Theme"

Option 1 works in Drupal 11.1.2 (after manually creating bootstrap5.starterkit.yml) while Option 2 fails with this stacktrace -

Error: Class "Drupal\bootstrap5\SubthemeManager" not found in /var/www/html/web/themes/contrib/bootstrap5/src/Drush/Commands/Bootstrap5Commands.php on line 67 #0 [internal function]: Drush\Commands\Bootstrap5Commands->generateSubtheme()
#1 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(276): call_user_func_array()
#2 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(212): Consolidation\AnnotatedCommand\CommandProcessor->runCommandCallback()
#3 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(175): Consolidation\AnnotatedCommand\CommandProcessor->validateRunAndAlter()
#4 /var/www/html/vendor/consolidation/annotated-command/src/AnnotatedCommand.php(387): Consolidation\AnnotatedCommand\CommandProcessor->process()
#5 /var/www/html/vendor/symfony/console/Command/Command.php(279): Consolidation\AnnotatedCommand\AnnotatedCommand->execute()
#6 /var/www/html/vendor/symfony/console/Application.php(1094): Symfony\Component\Console\Command\Command->run()
#7 /var/www/html/vendor/symfony/console/Application.php(342): Symfony\Component\Console\Application->doRunCommand()
#8 /var/www/html/vendor/symfony/console/Application.php(193): Symfony\Component\Console\Application->doRun()
#9 /var/www/html/vendor/drush/drush/src/Runtime/Runtime.php(110): Symfony\Component\Console\Application->run()
#10 /var/www/html/vendor/drush/drush/src/Runtime/Runtime.php(40): Drush\Runtime\Runtime->doRun()
#11 /var/www/html/vendor/drush/drush/drush.php(140): Drush\Runtime\Runtime->run()
#12 /var/www/html/vendor/bin/drush.php(119): include('...')
#13 {main}
Error: Class "Drupal\bootstrap5\SubthemeManager" not found in Drush\Commands\Bootstrap5Commands->generateSubtheme() (line 67 of /var/www/html/web/themes/contrib/bootstrap5/src/Drush/Commands/Bootstrap5Commands.php).
 [warning] Drush command terminated abnormally.

The README.md has the wrong command name in I think.

The readme states this:
drush --include="web/themes/contrib/bootstrap5/src/Drush" bootstrap5:subtheme MACHINE_NAME --subtheme-name="SUBTHEME_NAME"

When it should be this:

drush --include="web/themes/contrib/bootstrap5/src/Drush" bootstrap5:generate-subtheme MACHINE_NAME --subtheme-name="SUBTHEME_NAME"

And make sure the base theme is enabled to start with or you'll get this error:

Error: Class "Drupal\bootstrap5\SubthemeManager" not found in Drush\Commands\Bootstrap5Commands->generateSubtheme()

After enabling the theme and running the correct Drush command, it does work and generate the sub theme.